“We have established that the Vauxhall Corsa, which has a registration plate number starting with YS59, was in the Welwyn area at around 12.55am today and I am also keen to speak to anyone who may have seen the vehicle around this time.”

Anyone with information that could assist the investigation is asked to contact Hertfordshire Constabulary via the non-emergency number 101, quoting ISR 52 of 24/4/17.

Alternatively, contact the independent crime-fighting charity Crimestoppers anonymously on 0800 555 111 or through their anonymous online form at www.crimestoppers-uk.org.

#GritterTwitter we are working hard clearing priority routes, gritters & snow ploughs have been out several times already & over 1000 tonnes of salt has been put down since midnight, always drive to the conditions & remember salt may take longer to be effective in snowy weather